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A popular factory test claims scraped hair powder proves chemical treatment status. Peer-reviewed forensic science says otherwise. Read the evidence-based analysis.

A popular factory test claims scraped hair powder proves chemical treatment status. Peer-reviewed forensic science says otherwise. Read the evidence-based analysis.

The Powder Test for Hair Quality: What It Actually Measures — and What It Cannot

The Powder Test for Hair Quality: What It Actually Measures — and What It Cannot

5 days ago5 min read

Is Grey Hair Actually Translucent? The Optical Physics Behind the Question Colorists Cannot Ignore

Is Grey Hair Actually Translucent? The Optical Physics Behind the Question Colorists Cannot Ignore

Is Grey Hair Actually Translucent? The Optical Physics Behind the Question Colorists Cannot Ignore

Is Grey Hair Actually Translucent? The Optical Physics Behind the Question Colorists Cannot Ignore

Apr 35 min read

Nuclear DNA, mitochondrial DNA, and forensic microscopy each have distinct — and limited — capabilities when applied to hair provenance claims. Beth Thompson reviews what peer-reviewed forensic science currently supports, and where commercial claims exceed the evidence.

Nuclear DNA, mitochondrial DNA, and forensic microscopy each have distinct — and limited — capabilities when applied to hair provenance claims. Beth Thompson reviews what peer-reviewed forensic science currently supports, and where commercial claims exceed the evidence.

Hair Provenance and Forensic DNA: What the Science Can and Cannot Prove

What Forensic DNA Can, and Cannot, Prove About Hair Provenance

Mar 305 min read

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